Knowledge-intensive companies are quickly changing, involving many people working in different activities. Knowledge in such companies is diverse and its proportions immense and steadily growing. The distribution of knowledge across project teams, communities of practice, and individuals is therefore an important factor. With collaborative Web, tools like wikis, blogs, or social networks are used for collaboration and knowledge sharing. In this chapter, we question what influence these tools have on knowledge management, organizational structure, and culture of knowledge-intensive companies. As a result of our interviews and surveys done in Serbia, we found that with collaborative Web, organizational structure, culture, and knowledge management change is perceived among employees and that employee’s loyalty changes from company orientation toward virtual community orientation.